Sash-lock.



PATENTED SEPT.'8, 1903.

B. P. CHESHIRE.

SASH LOCK. APPLICATION rum) 00124. 1902.

NO MODEL.

we NORRIS pcrzns c0 mmau'ma, WASHINGTON, a c

Patented September 8, 1903.

PATENT OFFIC BASIL F. CHESHIRE, OF ST. JOSEPH, MISSOURI.

SASH-LOCK.

GPEGIFICATION forming part of Letters Patent No. 738,41 1, dated September 8, 1903.

Application filed October 24,1902. Serial No. 128,686. (No model.)

the meeting-rails of the upper and lower sash of an ordinary window.

Among the salient objects of the invention are toprovide animproved construction which is automatic in its locking operation and is nevertheless devoid of springs for effecting such locking movement; to provide a construction in which the movement of the sash into closed position operates to positively move the locking member into its locked position and in position to permit a gravity-actuated latch member to engage the same; to provide a construction which cannot be picked by the insertion of any kind of an instrument between the meeting-rails from the outside; to provide a construction which may be unfastened with the utmost ease and convenience from the inside; to provide a simple and strong construction which may be very economically manufactured, and in general to provide a simple and improved device of the character referred to.

To the above ends the invention consists in the matters hereinafter described, and more particularly pointed out in the appended claims, and the invention will be readily understood from the following description, reference being had to the accompanying drawings, forming a part thereof, and in which- Figure l is an inside elevation of a window equipped with my invention. Fig. 2 is a plan view of the meeting-rails of a pair of windowsashes, showing particularly the arrangement of the locking device as applied thereto, and Fig. 3 is a sectional View taken on the indirect line3 3 indicated in said Fig. 2 and looking in the direction of the arrows.

Referringto said drawings, 1 and 2, respectively, designate the upper and lower sash members as a whole, and 3 and 4 the meetingrails of the upper and lower sashes, respectively.

Upon the rail 4: is mounted the socket member (designated as a whole 5) which receives and holds the locking member or bar (des ignated as a whole 6) mounted upon the meeting-rail 3, as will hereinafter be described. Said member 5 comprises in the preferred embodiment shown herein a base-casting '7, adapted to be secured flatwise upon the top surface of the lower-sash meeting-rail and provided with laterally-opposite upstanding ears 8, between which is pivoted a swinging latch member 9. Said latch member is pivoted at a point between its ends, as indicated at 10, and is provided at its upper end with a thumb piece or button 11, whereby its upper end may be pressed outwardly to swing the lower end inwardly, the location of said pivotal axis 10 and the shape of the latch member being such that it tends to swing by gravity outwardly into the position best shown in Fig. 3. An upstanding flange 12 serves to limit the extent to which it may be oscillated away from its locking position.

The locking member or bar 6 is'shown as having the form of a flat plate-like member pivotally mounted at one end to abase member 13, which is suitably secured to the upper side of the meeting-rail of the top sash, said base member 13 being provided with slightly-upstanding pivot-ears 14, between which the end of the locking member 6 is pivoted in such manner as to permit said locking member to lie flat upon the upper surface of the base member 7. The length of the locking member is such that its swinging end when in locked position extends beneath the end of the latch member 9, the latter being provided with a rabbet or recess 15 to receive said end. The locking-bar is pivoted closely adjacent to the parting-line between the two sash-rails, asindicated at 16, and said bar is provided with a toe-like extension 17,whieh normally projects outwardly within a recess 18 formed in the front edge of the base-plate 13, but when the lockingbar is thrown back into unlocked position stands within the path of the proximate edge portion 19 of the base member 7. Said portion 19 is arranged to slightly overhang the edge of the rail upon which it is mounted, so that in its relative descent it engages the toe portion 17 of the locking-bar and oscillates the latter into locking position positively. I It will be understood from the foregoing de In order that the locking-bar may not drop backwardly beyond a proper position for the engagement therewith of the ledge portion 19, a stop-stud is provided upon the upper side of the base portion 13 in position to engage the back or normally upper side of the locking-bar and limit its pivotal movement, as indicated clearly in dotted lines in Fig. 3. In order also that said locking-bar may be more certainly held in its uplifted position during the time that the sashes are in separated or open position, the upper side of the locking-bar is 'provid ed with a rib-like onlargement 21, which adds substantially to the weight of the bar and insures its remaining in opening position.

In order to prevent the possibility of prying apart the meeting-rails of the sash sufficiently to disengage the locking-bar from the latch member, I provide upon the upper face of the base member 7 a stud-like projection 22, which is located immediately beneath the locking-bar, as indicated in dotted lines in Fig. 2, and in the under side-surface of said locking-bar I form a corresponding recess 23, which fits upon said stud when the lockingbar is in its normal position, and thus positively prevents a relative sliding movement of said parts.

The operation of the device has been indicated in connection with the description of the construction, but may be briefly restated as follows: Assuming that the device is in locked position and the operator wishes to raise the lower sash or lower the upper sash, he simply presses outwardly against the buttons 11, thus swinging the latch member out of'range of the locking-bar in its pivotal movement, whereupon either sash may be moved relatively to the other. As the sash- I rails separate the ledge portion 19 of the lower-sash rail presses upwardly against the under side of the locking-bar, thereby raising the latter to a vertical position, the toe portion 17 meantime being oscillated into a position underneath the ledge 19. As soon as the locking-bar reaches a vertical position it is out of equilibrium and tends to fall backwardly by reason of the weight upon its upper or back .side, and accordingly assumes the position indicated in dotted lines in Fig. 3. Upon the closing movement of the sash the ledge 19 engages the too 17 and oscillates the locking-bar into its locking position, the swinging end of said bar engaging the proximate side of the latch member and swinging the latter inwardly until the end of the bar registers with the notch 15, whereupon the weight of the latch returns it to locked position, thus eifecting a completely-automatic locking movement.

-rails as to be inaccessible.

scription that the device is not'only extremely simple of construction and entirely devoid of springs, but also that the movement of the sash members to a closed position operates to positively carry the locking-bar into locking position, and, further, that when locked it is impossible to pick the look by means of an instrument inserted between the meeting-rails. The ledge portion 19, it will be seen, overlies the proximate edge of the opposite rail 3, thus preventing direct access to the locking-bar, and, furthermore,the latohjs located at such distance from the parting-line between the All of the parts may be made of malleableized castings requiring no special fitting, so that the cost of the device may be reduced to a minimum.

While I have herein shown what I deem to be the preferred embodiment of the invention, yet it will be understood that the details of construction may be somewhat modified without departing from the invention. I do not, therefore, limit myself to the specific details, except to the extent that they are made the subject of specific claims.

I claim as my invention A sash-lock comprising a pair of base members, adapted to be respectively mounted upon the meeting-rails of a pair of windowsashes, a locking-bar pivoted on one of said base members'and adapted to rest flatwise across the other base member, a downturned cam projection upon the pivot end of said locking-bar, a lip-like projection upon the opposite base member, adapted to engage said cam projection and oscillate the locking-bar positively into closed position upon the approaching movement of the sash-rails, interfitting projections and recesses upon and within said locking-barand said base members, over which the latter lies, whereby the meeting-rails are positively held against sop:

.arating movement, a stop arranged to limit the pivotal movement of the locking-bar and to hold the latter in open position with its cam in the path of the cooperating base-lip, and a pendulous latch member pivoted above the swinging end of the locking-bar and having its upright face proximate to the lockingbar arranged to swing by gravity into the path of the latter, the engaging end of said pend ulous latch being provided with an overhanging shoulder, adapted to positively confine the locking-bar, and the opposite end of the latch provided with a finger-piece extension, substantially as described.

BASIL F. CHESHIRE.

Witnesses:

F. G. ADELMAN, H. E. STANTON. 

